Homologous Recombination Deficiency Status in Epithelial Ovarian Cancer

The homologous recombination deficiency (HRD) status in Chinese population with epithelial ovarian cancer (EOC) is little known. This study would recruit 1300 Chinese EOC patients. A multi-panel testing of 36 genes would be given for these patients in their peripheral blood and tumor tissues. These 36 genes include: BRCA1, BRCA2, ABRAXAS1(FAM175A）, ATM, ATR, BAP1, BARD1, BRIP1, C11ORF30（EMSY）, CDK12, CHEK1, CHEK2, FANCA, FANCC, FANCD2, FANCI, FANCL, MRE11A, NBN, PALB2, PPP2R2A, PTEN, RAD50, RAD51B, RAD51C, RAD51D, RAD54B, RAD54, MLH1, MSH2, MSH6, PMS2, EPCAM, STK11, TP53, CDH1. The study would select 150 patients with pathogenic or likely pathogenic mutations in BRCA1/2 and 150 patients without these mutations to further explore the HRD status. The HRD model is based on the loss of heterozygosity (LOH), telomere allele imbalance (TAI) and large-scale state transitions (LST). The mutated genes, HRD score model and their relationship with the prognosis, would provide a full description of for the Chinese EOC patients.